#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int is_leap_year(int x)
{

	return (((x % 4 == 0) && (x % 100 != 0)) || (x % 400 == 0));
}
int main()
{
	int year = 0;

	for (year = 1000; year <= 2000; year++)
	{
		if (is_leap_year(year))
		{
			printf("%d ",year);
		}
		
	}
	
	return 0;
}